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7. Groundwater <br /> Groundwater is located approximately four to five feet below the surface at the Delta Paving <br /> site. This is evident from Elam's experience of mining at the site and the water levels <br /> experienced in the reclaimed lakes onsite. Five gravel well permits are approved for the <br /> operation and are located in various locations on site that correspond with historical mining <br /> plans. An additional two wells are located just outside the permit area; one to the east of the <br /> site, and one to the southwest. These well locations are shown in Map C-1. Table G-3 identifies <br /> each well. <br /> Table G-3 Wells Within 600' of Permit Area <br /> Total Distance from <br /> Depth nearest mining <br /> Permit ID (feet) Pur area(ft) <br /> pose <br /> ` dustrlal Use 245 <br /> Delta PavingPit Well No.2 053787-F 25 Industrial Uses 370 <br /> D Pa-„ <br /> � +�t l�o.3 ­% � lndusfiial Efises 350 <br /> Delta Pavino Pit Well No.4 053787-F 25 Industrial Uses 0 <br /> Da " #ell No.S 0678 - lnd ws I" <br /> etta P ; 4 <br /> Lance,Eldon S. 96594 80 Domestic Stock 295 <br /> F 1 2€ .;,:.....,30 S k 340 <br /> *Mr.Frazier is the landowner for the majority of the Delta Paving property <br /> 7.1 . Groundwater — Mining <br /> Mining activities will expose groundwater throughout the life of the mine. Pit dewatering will take <br /> place in the active pit to bring the groundwater table below the operating floor. This allows <br /> mining equipment to safely and effectively extract the material at the site. The pit pump will be <br /> active throughout the entire mining season, typically mid-April to early-November, depending on <br /> weather. It will be turned off during flood events or when temperatures drop below freezing. <br /> Pit dewatering will intercept groundwater from the alluvial aquifer of the Gunnison River that <br /> enters the pit to be routed back to the Gunnison River via the Relief Ditch after settling in the <br /> sediment pond. The typical pump setup within each pit and discharge point are mapped on Map <br /> C-2. The pit pump will be a mobile pump with a diesel generator. The generator has an onboard <br /> fuel tank which will have secondary containment. The pump will typically be located two feet <br /> below the active mining floor at the lowest point of the pit. It will be surrounded by a gravel filter. <br /> This configuration minimizes the sediment being pumped out of the pit. <br /> Pumped water will be transported to the reclaimed lake which acts as a settling pond to prevent <br /> sediment from being discharged back into the river. This system of dewatering is proven to <br /> successfully return the water from the mining operations to the Gunnison River while trapping <br /> sediment on site. <br /> 7.2. Groundwater — Reclamation <br /> Following reclamation of the site, pit pumping will cease. Permanent groundwater lakes will be <br /> left behind from the mining pits, as can be seen on Map F-1. The lakes will generate <br /> Delta Paving Gravel Pit <br /> April 2022 G-6 Lewicki 8;Associates <br />